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-rw-r--r--libavcodec/hevc.c524
1 files changed, 5 insertions, 519 deletions
diff --git a/libavcodec/hevc.c b/libavcodec/hevc.c
index 9ea42a0a6f..f21ec39f38 100644
--- a/libavcodec/hevc.c
+++ b/libavcodec/hevc.c
@@ -40,178 +40,6 @@ const uint8_t ff_hevc_qpel_extra_before[4] = { 0, 3, 3, 2 };
const uint8_t ff_hevc_qpel_extra_after[4] = { 0, 3, 4, 4 };
const uint8_t ff_hevc_qpel_extra[4] = { 0, 6, 7, 6 };
-static const uint8_t scan_1x1[1] = {
- 0,
-};
-
-static const uint8_t horiz_scan2x2_x[4] = {
- 0, 1, 0, 1,
-};
-
-static const uint8_t horiz_scan2x2_y[4] = {
- 0, 0, 1, 1
-};
-
-static const uint8_t horiz_scan4x4_x[16] = {
- 0, 1, 2, 3,
- 0, 1, 2, 3,
- 0, 1, 2, 3,
- 0, 1, 2, 3,
-};
-
-static const uint8_t horiz_scan4x4_y[16] = {
- 0, 0, 0, 0,
- 1, 1, 1, 1,
- 2, 2, 2, 2,
- 3, 3, 3, 3,
-};
-
-static const uint8_t horiz_scan8x8_inv[8][8] = {
- { 0, 1, 2, 3, 16, 17, 18, 19, },
- { 4, 5, 6, 7, 20, 21, 22, 23, },
- { 8, 9, 10, 11, 24, 25, 26, 27, },
- { 12, 13, 14, 15, 28, 29, 30, 31, },
- { 32, 33, 34, 35, 48, 49, 50, 51, },
- { 36, 37, 38, 39, 52, 53, 54, 55, },
- { 40, 41, 42, 43, 56, 57, 58, 59, },
- { 44, 45, 46, 47, 60, 61, 62, 63, },
-};
-
-static const uint8_t diag_scan4x1_x[4] = {
- 0, 1, 2, 3,
-};
-
-static const uint8_t diag_scan1x4_y[4] = {
- 0, 1, 2, 3,
-};
-
-static const uint8_t diag_scan2x2_x[4] = {
- 0, 0, 1, 1,
-};
-
-static const uint8_t diag_scan2x2_y[4] = {
- 0, 1, 0, 1,
-};
-
-static const uint8_t diag_scan2x2_inv[2][2] = {
- { 0, 2, },
- { 1, 3, },
-};
-
-static const uint8_t diag_scan8x2_x[16] = {
- 0, 0, 1, 1,
- 2, 2, 3, 3,
- 4, 4, 5, 5,
- 6, 6, 7, 7,
-};
-
-static const uint8_t diag_scan8x2_y[16] = {
- 0, 1, 0, 1,
- 0, 1, 0, 1,
- 0, 1, 0, 1,
- 0, 1, 0, 1,
-};
-
-static const uint8_t diag_scan8x2_inv[2][8] = {
- { 0, 2, 4, 6, 8, 10, 12, 14, },
- { 1, 3, 5, 7, 9, 11, 13, 15, },
-};
-
-static const uint8_t diag_scan2x8_x[16] = {
- 0, 0, 1, 0,
- 1, 0, 1, 0,
- 1, 0, 1, 0,
- 1, 0, 1, 1,
-};
-
-static const uint8_t diag_scan2x8_y[16] = {
- 0, 1, 0, 2,
- 1, 3, 2, 4,
- 3, 5, 4, 6,
- 5, 7, 6, 7,
-};
-
-static const uint8_t diag_scan2x8_inv[8][2] = {
- { 0, 2, },
- { 1, 4, },
- { 3, 6, },
- { 5, 8, },
- { 7, 10, },
- { 9, 12, },
- { 11, 14, },
- { 13, 15, },
-};
-
-const uint8_t ff_hevc_diag_scan4x4_x[16] = {
- 0, 0, 1, 0,
- 1, 2, 0, 1,
- 2, 3, 1, 2,
- 3, 2, 3, 3,
-};
-
-const uint8_t ff_hevc_diag_scan4x4_y[16] = {
- 0, 1, 0, 2,
- 1, 0, 3, 2,
- 1, 0, 3, 2,
- 1, 3, 2, 3,
-};
-
-static const uint8_t diag_scan4x4_inv[4][4] = {
- { 0, 2, 5, 9, },
- { 1, 4, 8, 12, },
- { 3, 7, 11, 14, },
- { 6, 10, 13, 15, },
-};
-
-const uint8_t ff_hevc_diag_scan8x8_x[64] = {
- 0, 0, 1, 0,
- 1, 2, 0, 1,
- 2, 3, 0, 1,
- 2, 3, 4, 0,
- 1, 2, 3, 4,
- 5, 0, 1, 2,
- 3, 4, 5, 6,
- 0, 1, 2, 3,
- 4, 5, 6, 7,
- 1, 2, 3, 4,
- 5, 6, 7, 2,
- 3, 4, 5, 6,
- 7, 3, 4, 5,
- 6, 7, 4, 5,
- 6, 7, 5, 6,
- 7, 6, 7, 7,
-};
-
-const uint8_t ff_hevc_diag_scan8x8_y[64] = {
- 0, 1, 0, 2,
- 1, 0, 3, 2,
- 1, 0, 4, 3,
- 2, 1, 0, 5,
- 4, 3, 2, 1,
- 0, 6, 5, 4,
- 3, 2, 1, 0,
- 7, 6, 5, 4,
- 3, 2, 1, 0,
- 7, 6, 5, 4,
- 3, 2, 1, 7,
- 6, 5, 4, 3,
- 2, 7, 6, 5,
- 4, 3, 7, 6,
- 5, 4, 7, 6,
- 5, 7, 6, 7,
-};
-
-static const uint8_t diag_scan8x8_inv[8][8] = {
- { 0, 2, 5, 9, 14, 20, 27, 35, },
- { 1, 4, 8, 13, 19, 26, 34, 42, },
- { 3, 7, 12, 18, 25, 33, 41, 48, },
- { 6, 11, 17, 24, 32, 40, 47, 53, },
- { 10, 16, 23, 31, 39, 46, 52, 57, },
- { 15, 22, 30, 38, 45, 51, 56, 60, },
- { 21, 29, 37, 44, 50, 55, 59, 62, },
- { 28, 36, 43, 49, 54, 58, 61, 63, },
-};
-
/**
* NOTE: Each function hls_foo correspond to the function foo in the
* specification (HLS stands for High Level Syntax).
@@ -873,348 +701,6 @@ static void hls_sao_param(HEVCContext *s, int rx, int ry)
#undef SET_SAO
#undef CTB
-static void hls_residual_coding(HEVCContext *s, int x0, int y0,
- int log2_trafo_size, enum ScanType scan_idx,
- int c_idx)
-{
-#define GET_COORD(offset, n) \
- do { \
- x_c = (scan_x_cg[offset >> 4] << 2) + scan_x_off[n]; \
- y_c = (scan_y_cg[offset >> 4] << 2) + scan_y_off[n]; \
- } while (0)
- HEVCLocalContext *lc = &s->HEVClc;
- int transform_skip_flag = 0;
-
- int last_significant_coeff_x, last_significant_coeff_y;
- int last_scan_pos;
- int n_end;
- int num_coeff = 0;
- int greater1_ctx = 1;
-
- int num_last_subset;
- int x_cg_last_sig, y_cg_last_sig;
-
- const uint8_t *scan_x_cg, *scan_y_cg, *scan_x_off, *scan_y_off;
-
- ptrdiff_t stride = s->frame->linesize[c_idx];
- int hshift = s->sps->hshift[c_idx];
- int vshift = s->sps->vshift[c_idx];
- uint8_t *dst = &s->frame->data[c_idx][(y0 >> vshift) * stride +
- ((x0 >> hshift) << s->sps->pixel_shift)];
- DECLARE_ALIGNED(16, int16_t, coeffs[MAX_TB_SIZE * MAX_TB_SIZE]) = {0};
- DECLARE_ALIGNED(8, uint8_t, significant_coeff_group_flag[8][8]) = {{0}};
-
- int trafo_size = 1 << log2_trafo_size;
- int i;
- int qp,shift,add,scale,scale_m;
- const uint8_t level_scale[] = { 40, 45, 51, 57, 64, 72 };
- const uint8_t *scale_matrix;
- uint8_t dc_scale;
-
- // Derive QP for dequant
- if (!lc->cu.cu_transquant_bypass_flag) {
- static const int qp_c[] = { 29, 30, 31, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37 };
- static const uint8_t rem6[51 + 2 * 6 + 1] = {
- 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2,
- 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5,
- 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3,
- };
-
- static const uint8_t div6[51 + 2 * 6 + 1] = {
- 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 3, 3, 3,
- 3, 3, 3, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6,
- 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10,
- };
- int qp_y = lc->qp_y;
-
- if (c_idx == 0) {
- qp = qp_y + s->sps->qp_bd_offset;
- } else {
- int qp_i, offset;
-
- if (c_idx == 1)
- offset = s->pps->cb_qp_offset + s->sh.slice_cb_qp_offset;
- else
- offset = s->pps->cr_qp_offset + s->sh.slice_cr_qp_offset;
-
- qp_i = av_clip_c(qp_y + offset, - s->sps->qp_bd_offset, 57);
- if (qp_i < 30)
- qp = qp_i;
- else if (qp_i > 43)
- qp = qp_i - 6;
- else
- qp = qp_c[qp_i - 30];
-
- qp += s->sps->qp_bd_offset;
- }
-
- shift = s->sps->bit_depth + log2_trafo_size - 5;
- add = 1 << (shift-1);
- scale = level_scale[rem6[qp]] << (div6[qp]);
- scale_m = 16; // default when no custom scaling lists.
- dc_scale = 16;
-
- if (s->sps->scaling_list_enable_flag) {
- const ScalingList *sl = s->pps->pps_scaling_list_data_present_flag ?
- &s->pps->scaling_list : &s->sps->scaling_list;
- int matrix_id = lc->cu.pred_mode != MODE_INTRA;
-
- if (log2_trafo_size != 5)
- matrix_id = 3 * matrix_id + c_idx;
-
- scale_matrix = sl->sl[log2_trafo_size - 2][matrix_id];
- if (log2_trafo_size >= 4)
- dc_scale = sl->sl_dc[log2_trafo_size - 4][matrix_id];
- }
- }
-
- if (s->pps->transform_skip_enabled_flag && !lc->cu.cu_transquant_bypass_flag &&
- log2_trafo_size == 2) {
- transform_skip_flag = ff_hevc_transform_skip_flag_decode(s, c_idx);
- }
-
- last_significant_coeff_x =
- ff_hevc_last_significant_coeff_x_prefix_decode(s, c_idx, log2_trafo_size);
- last_significant_coeff_y =
- ff_hevc_last_significant_coeff_y_prefix_decode(s, c_idx, log2_trafo_size);
-
- if (last_significant_coeff_x > 3) {
- int suffix = ff_hevc_last_significant_coeff_suffix_decode(s, last_significant_coeff_x);
- last_significant_coeff_x = (1 << ((last_significant_coeff_x >> 1) - 1)) *
- (2 + (last_significant_coeff_x & 1)) +
- suffix;
- }
-
- if (last_significant_coeff_y > 3) {
- int suffix = ff_hevc_last_significant_coeff_suffix_decode(s, last_significant_coeff_y);
- last_significant_coeff_y = (1 << ((last_significant_coeff_y >> 1) - 1)) *
- (2 + (last_significant_coeff_y & 1)) +
- suffix;
- }
-
- if (scan_idx == SCAN_VERT)
- FFSWAP(int, last_significant_coeff_x, last_significant_coeff_y);
-
- x_cg_last_sig = last_significant_coeff_x >> 2;
- y_cg_last_sig = last_significant_coeff_y >> 2;
-
- switch (scan_idx) {
- case SCAN_DIAG: {
- int last_x_c = last_significant_coeff_x & 3;
- int last_y_c = last_significant_coeff_y & 3;
-
- scan_x_off = ff_hevc_diag_scan4x4_x;
- scan_y_off = ff_hevc_diag_scan4x4_y;
- num_coeff = diag_scan4x4_inv[last_y_c][last_x_c];
- if (trafo_size == 4) {
- scan_x_cg = scan_1x1;
- scan_y_cg = scan_1x1;
- } else if (trafo_size == 8) {
- num_coeff += diag_scan2x2_inv[y_cg_last_sig][x_cg_last_sig] << 4;
- scan_x_cg = diag_scan2x2_x;
- scan_y_cg = diag_scan2x2_y;
- } else if (trafo_size == 16) {
- num_coeff += diag_scan4x4_inv[y_cg_last_sig][x_cg_last_sig] << 4;
- scan_x_cg = ff_hevc_diag_scan4x4_x;
- scan_y_cg = ff_hevc_diag_scan4x4_y;
- } else { // trafo_size == 32
- num_coeff += diag_scan8x8_inv[y_cg_last_sig][x_cg_last_sig] << 4;
- scan_x_cg = ff_hevc_diag_scan8x8_x;
- scan_y_cg = ff_hevc_diag_scan8x8_y;
- }
- break;
- }
- case SCAN_HORIZ:
- scan_x_cg = horiz_scan2x2_x;
- scan_y_cg = horiz_scan2x2_y;
- scan_x_off = horiz_scan4x4_x;
- scan_y_off = horiz_scan4x4_y;
- num_coeff = horiz_scan8x8_inv[last_significant_coeff_y][last_significant_coeff_x];
- break;
- default: //SCAN_VERT
- scan_x_cg = horiz_scan2x2_y;
- scan_y_cg = horiz_scan2x2_x;
- scan_x_off = horiz_scan4x4_y;
- scan_y_off = horiz_scan4x4_x;
- num_coeff = horiz_scan8x8_inv[last_significant_coeff_x][last_significant_coeff_y];
- break;
- }
- num_coeff++;
- num_last_subset = (num_coeff - 1) >> 4;
-
- for (i = num_last_subset; i >= 0; i--) {
- int n, m;
- int x_cg, y_cg, x_c, y_c, pos;
- int implicit_non_zero_coeff = 0;
- int64_t trans_coeff_level;
- int prev_sig = 0;
- int offset = i << 4;
-
- uint8_t significant_coeff_flag_idx[16];
- uint8_t nb_significant_coeff_flag = 0;
-
- x_cg = scan_x_cg[i];
- y_cg = scan_y_cg[i];
-
- if ((i < num_last_subset) && (i > 0)) {
- int ctx_cg = 0;
- if (x_cg < (1 << (log2_trafo_size - 2)) - 1)
- ctx_cg += significant_coeff_group_flag[x_cg + 1][y_cg];
- if (y_cg < (1 << (log2_trafo_size - 2)) - 1)
- ctx_cg += significant_coeff_group_flag[x_cg][y_cg + 1];
-
- significant_coeff_group_flag[x_cg][y_cg] =
- ff_hevc_significant_coeff_group_flag_decode(s, c_idx, ctx_cg);
- implicit_non_zero_coeff = 1;
- } else {
- significant_coeff_group_flag[x_cg][y_cg] =
- ((x_cg == x_cg_last_sig && y_cg == y_cg_last_sig) ||
- (x_cg == 0 && y_cg == 0));
- }
-
- last_scan_pos = num_coeff - offset - 1;
-
- if (i == num_last_subset) {
- n_end = last_scan_pos - 1;
- significant_coeff_flag_idx[0] = last_scan_pos;
- nb_significant_coeff_flag = 1;
- } else {
- n_end = 15;
- }
-
- if (x_cg < ((1 << log2_trafo_size) - 1) >> 2)
- prev_sig = significant_coeff_group_flag[x_cg + 1][y_cg];
- if (y_cg < ((1 << log2_trafo_size) - 1) >> 2)
- prev_sig += (significant_coeff_group_flag[x_cg][y_cg + 1] << 1);
-
- for (n = n_end; n >= 0; n--) {
- GET_COORD(offset, n);
-
- if (significant_coeff_group_flag[x_cg][y_cg] &&
- (n > 0 || implicit_non_zero_coeff == 0)) {
- if (ff_hevc_significant_coeff_flag_decode(s, c_idx, x_c, y_c, log2_trafo_size, scan_idx, prev_sig) == 1) {
- significant_coeff_flag_idx[nb_significant_coeff_flag] = n;
- nb_significant_coeff_flag++;
- implicit_non_zero_coeff = 0;
- }
- } else {
- int last_cg = (x_c == (x_cg << 2) && y_c == (y_cg << 2));
- if (last_cg && implicit_non_zero_coeff && significant_coeff_group_flag[x_cg][y_cg]) {
- significant_coeff_flag_idx[nb_significant_coeff_flag] = n;
- nb_significant_coeff_flag++;
- }
- }
- }
-
- n_end = nb_significant_coeff_flag;
-
-
- if (n_end) {
- int first_nz_pos_in_cg = 16;
- int last_nz_pos_in_cg = -1;
- int c_rice_param = 0;
- int first_greater1_coeff_idx = -1;
- uint8_t coeff_abs_level_greater1_flag[16] = {0};
- uint16_t coeff_sign_flag;
- int sum_abs = 0;
- int sign_hidden = 0;
-
- // initialize first elem of coeff_bas_level_greater1_flag
- int ctx_set = (i > 0 && c_idx == 0) ? 2 : 0;
-
- if (!(i == num_last_subset) && greater1_ctx == 0)
- ctx_set++;
- greater1_ctx = 1;
- last_nz_pos_in_cg = significant_coeff_flag_idx[0];
-
- for (m = 0; m < (n_end > 8 ? 8 : n_end); m++) {
- int n_idx = significant_coeff_flag_idx[m];
- int inc = (ctx_set << 2) + greater1_ctx;
- coeff_abs_level_greater1_flag[n_idx] =
- ff_hevc_coeff_abs_level_greater1_flag_decode(s, c_idx, inc);
- if (coeff_abs_level_greater1_flag[n_idx]) {
- greater1_ctx = 0;
- } else if (greater1_ctx > 0 && greater1_ctx < 3) {
- greater1_ctx++;
- }
-
- if (coeff_abs_level_greater1_flag[n_idx] &&
- first_greater1_coeff_idx == -1)
- first_greater1_coeff_idx = n_idx;
- }
- first_nz_pos_in_cg = significant_coeff_flag_idx[n_end - 1];
- sign_hidden = (last_nz_pos_in_cg - first_nz_pos_in_cg >= 4 &&
- !lc->cu.cu_transquant_bypass_flag);
-
- if (first_greater1_coeff_idx != -1) {
- coeff_abs_level_greater1_flag[first_greater1_coeff_idx] += ff_hevc_coeff_abs_level_greater2_flag_decode(s, c_idx, ctx_set);
- }
- if (!s->pps->sign_data_hiding_flag || !sign_hidden ) {
- coeff_sign_flag = ff_hevc_coeff_sign_flag(s, nb_significant_coeff_flag) << (16 - nb_significant_coeff_flag);
- } else {
- coeff_sign_flag = ff_hevc_coeff_sign_flag(s, nb_significant_coeff_flag - 1) << (16 - (nb_significant_coeff_flag - 1));
- }
-
- for (m = 0; m < n_end; m++) {
- n = significant_coeff_flag_idx[m];
- GET_COORD(offset, n);
- trans_coeff_level = 1 + coeff_abs_level_greater1_flag[n];
- if (trans_coeff_level == ((m < 8) ?
- ((n == first_greater1_coeff_idx) ? 3 : 2) : 1)) {
- int last_coeff_abs_level_remaining = ff_hevc_coeff_abs_level_remaining(s, trans_coeff_level, c_rice_param);
-
- trans_coeff_level += last_coeff_abs_level_remaining;
- if ((trans_coeff_level) > (3 * (1 << c_rice_param)))
- c_rice_param = FFMIN(c_rice_param + 1, 4);
-
- }
- if (s->pps->sign_data_hiding_flag && sign_hidden) {
- sum_abs += trans_coeff_level;
- if (n == first_nz_pos_in_cg && ((sum_abs&1) == 1))
- trans_coeff_level = -trans_coeff_level;
- }
- if (coeff_sign_flag >> 15)
- trans_coeff_level = -trans_coeff_level;
- coeff_sign_flag <<= 1;
- if(!lc->cu.cu_transquant_bypass_flag) {
- if(s->sps->scaling_list_enable_flag) {
- if(y_c || x_c || log2_trafo_size < 4) {
- switch(log2_trafo_size) {
- case 3: pos = (y_c << 3) + x_c; break;
- case 4: pos = ((y_c >> 1) << 3) + (x_c >> 1); break;
- case 5: pos = ((y_c >> 2) << 3) + (x_c >> 2); break;
- default: pos = (y_c << 2) + x_c;
- }
- scale_m = scale_matrix[pos];
- } else {
- scale_m = dc_scale;
- }
- }
- trans_coeff_level = (trans_coeff_level * (int64_t)scale * (int64_t)scale_m + add) >> shift;
- if(trans_coeff_level < 0) {
- if((~trans_coeff_level) & 0xFffffffffff8000)
- trans_coeff_level = -32768;
- } else {
- if(trans_coeff_level & 0xffffffffffff8000)
- trans_coeff_level = 32767;
- }
- }
- coeffs[y_c * trafo_size + x_c] = trans_coeff_level;
- }
- }
- }
-
- if (lc->cu.cu_transquant_bypass_flag) {
- s->hevcdsp.transquant_bypass[log2_trafo_size-2](dst, coeffs, stride);
- } else {
- if (transform_skip_flag)
- s->hevcdsp.transform_skip(dst, coeffs, stride);
- else if (lc->cu.pred_mode == MODE_INTRA && c_idx == 0 && log2_trafo_size == 2)
- s->hevcdsp.transform_4x4_luma_add(dst, coeffs, stride);
- else
- s->hevcdsp.transform_add[log2_trafo_size-2](dst, coeffs, stride);
- }
-}
static void hls_transform_unit(HEVCContext *s, int x0, int y0, int xBase, int yBase, int cb_xBase, int cb_yBase,
int log2_cb_size, int log2_trafo_size, int trafo_depth, int blk_idx)
@@ -1272,17 +758,17 @@ static void hls_transform_unit(HEVCContext *s, int x0, int y0, int xBase, int y
}
if (lc->tt.cbf_luma)
- hls_residual_coding(s, x0, y0, log2_trafo_size, scan_idx, 0);
+ ff_hevc_hls_residual_coding(s, x0, y0, log2_trafo_size, scan_idx, 0);
if (log2_trafo_size > 2) {
if (SAMPLE_CBF(lc->tt.cbf_cb[trafo_depth], x0, y0))
- hls_residual_coding(s, x0, y0, log2_trafo_size - 1, scan_idx_c, 1);
+ ff_hevc_hls_residual_coding(s, x0, y0, log2_trafo_size - 1, scan_idx_c, 1);
if (SAMPLE_CBF(lc->tt.cbf_cr[trafo_depth], x0, y0))
- hls_residual_coding(s, x0, y0, log2_trafo_size - 1, scan_idx_c, 2);
+ ff_hevc_hls_residual_coding(s, x0, y0, log2_trafo_size - 1, scan_idx_c, 2);
} else if (blk_idx == 3) {
if (SAMPLE_CBF(lc->tt.cbf_cb[trafo_depth], xBase, yBase))
- hls_residual_coding(s, xBase, yBase, log2_trafo_size, scan_idx_c, 1);
+ ff_hevc_hls_residual_coding(s, xBase, yBase, log2_trafo_size, scan_idx_c, 1);
if (SAMPLE_CBF(lc->tt.cbf_cr[trafo_depth], xBase, yBase))
- hls_residual_coding(s, xBase, yBase, log2_trafo_size, scan_idx_c, 2);
+ ff_hevc_hls_residual_coding(s, xBase, yBase, log2_trafo_size, scan_idx_c, 2);
}
}
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-15 20:20:10 +0000